Zinc ores and extraction 2 - NFA. How we extract zinc from its ores. Stage 1. The low concentrations of the zinc sulphide mineral in most zinc ores mean that the ore must first be concentrated... Zinc blende is concentrated by floath floatation process. The pulverized ore is kept in large tank containing water and pine oil. The mixture is agitated by passing compressed air. Ore forms froth and comes to the surface while impurities are left in water.